Accession Number : AD0840747

Title :   IMPROVING THE PERFORMANCE OF ELECTROLUMINESCENT LAMPS AT ELEVATED TEMPERATURES.

Descriptive Note : Final rept. 1 May 66-Nov 67,

Corporate Author : LEAR SIEGLER INC GRAND RAPIDS MI INSTRUMENT DIV

Personal Author(s) : Thompson, Darrell T. ; Petertyl, Sidney V. ; Wysocki, Chester A.

Report Date : JUL 1968

Pagination or Media Count : 147

Abstract : The report provides a performance characterization of electroluminescent lamps with regard to temperature. Performance of typical state-of-the-art constructions are compared to special EL lamps using experimentally modified phosphors developed through this program. A method for encapsulation of individual phosphor particles by coating their surfaces with refractory oxide materials in a fluidized bed reactor is described. The effect of operation at various temperatures -- from -50C to +100C -- on brightness, current, power, and spectral emission is described for EL lamps using coated and uncoated zinc sulphide and zinc sulpho-selenide phosphors. Improvement in operating life is reported for titanium dioxide coated zinc sulphoselenide EL phosphor. (Author)

Descriptors :   (*LIGHTING EQUIPMENT, THERMAL STABILITY), (*DISPLAY SYSTEMS, ELECTROLUMINESCENCE), PHOSPHORESCENT MATERIALS, ZINC SULFIDES, REFRACTORY COATINGS, FLUIDIZED BED PROCESSES, ALUMINUM COMPOUNDS, OXIDES, BERYLLIUM OXIDES, SILICON DIOXIDE, TIN COMPOUNDS, TITANIUM COMPOUNDS, ZINC COMPOUNDS, ZIRCONIUM OXIDES, VAPOR PLATING, BRIGHTNESS, POWER.

Subject Categories : Air Condition, Heating, Lighting & Ventilating

Distribution Statement : APPROVED FOR PUBLIC RELEASE